EMCalTriggerPtAnalysis::AliEmcalTriggerOfflineSelection Class Reference

Helper class selecting events on the presence of a trigger patch for the given type above threshold. More...

#include <AliEmcalTriggerOfflineSelection.h>

Inheritance diagram for EMCalTriggerPtAnalysis::AliEmcalTriggerOfflineSelection:

Public Types
enum	EmcalTriggerClass {   kTrgEL0 = 0, kTrgEG1, kTrgEG2, kTrgEJ1,   kTrgEJ2, kTrgDL0, kTrgDG1, kTrgDG2,   kTrgDJ1, kTrgDJ2, kTrgn }
	Definition of the various supported trigger types. More...

Public Member Functions
	AliEmcalTriggerOfflineSelection ()
virtual	~AliEmcalTriggerOfflineSelection ()
void	SetOfflineEnergyThreshold (EmcalTriggerClass trgcls, double threshold)
void	SetAcceptanceMap (EmcalTriggerClass trgcls, const TH2 *accmap)
Bool_t	IsOfflineSelected (EmcalTriggerClass trgcls, const TClonesArray *const triggerpatches) const
Double_t	GetThresholdForTrigger (EmcalTriggerClass trgcls) const

Static Public Member Functions
static Bool_t	IsSingleShower (EmcalTriggerClass cls)
static Bool_t	IsDCAL (EmcalTriggerClass cls)
static const TString &	GetTriggerName (EmcalTriggerClass cls)

Protected Attributes
Double_t	fOfflineEnergyThreshold [kTrgn]
	Thresholds applied on offline energy. More...
const TH2 *	fAcceptanceMaps [kTrgn]
	! Online acceptance distribution More...

Static Protected Attributes
static const TString	fgkTriggerNames [kTrgn]
	Names of the various trigger classes. More...

Detailed Description

Helper class selecting events on the presence of a trigger patch for the given type above threshold.

Author

Markus Fasel marku.nosp@m.s.fa.nosp@m.sel@c.nosp@m.ern..nosp@m.ch, Lawrence Berkeley National Laboratory

Since

Feb 23, 2016

AliEmcalTriggerOffline selection provides the functionality to select triggered events based on the presence of a trigger patch for the given type above energy threshold. As convention the calibrated energy from cells is used to select patches above threshold. Energy thresholds can be set via

AliEmcalTriggerOfflineSelection sel
// Setting 10 GeV threshold for the L1 gamma trigger
sel.SetOfflineEnergyThreshold(AliEmcalTriggerOfflineSelection::kTrgEG1, 10.);

In order to mimic non-uniform trigger acceptance, acceptance maps from Data can be used in the trigger patch selection. When available, trigger patches are selected on a statistical basis using the map, which is expected to be normalized to the position with the maximum trigger counts, in order to provide a probability value. Acceptance maps are set via

TH2 *accEG1; // User is responsible to load the histogram
sel.SetAcceptanceMap(AliEmcalTriggerOfflineSelection::kTrgEG1, accEG1);

Attention: This class takes over ownership and expects the histogram to not belong to a directory. In case no acceptance map is providede, no acceptance mimicing is applied.

Definition at line 46 of file AliEmcalTriggerOfflineSelection.h.

Member Enumeration Documentation

enum EMCalTriggerPtAnalysis::AliEmcalTriggerOfflineSelection::EmcalTriggerClass

Definition of the various supported trigger types.

Enumerator
kTrgEL0	EMCAL L0 trigger.
kTrgEG1	EMCAL L1 Gamma trigger, high threshold.
kTrgEG2	EMCAL L1 Gamma trigger, low threshold.
kTrgEJ1	EMCAL L1 Jet trigger, high threshold.
kTrgEJ2	EMCAL L1 Jet trigger, low threshold.
kTrgDL0	DCAL L0 trigger.
kTrgDG1	DCAL L1 Gamma trigger, high threshold.
kTrgDG2	DCAL L1 Gamma trigger, low threshold.
kTrgDJ1	DCAL L1 Jet trigger, high threshold.
kTrgDJ2	DCAL L1 Jet trigger, low threshold.
kTrgn	Number of supported triggers.

Definition at line 52 of file AliEmcalTriggerOfflineSelection.h.

Constructor & Destructor Documentation

EMCalTriggerPtAnalysis::AliEmcalTriggerOfflineSelection::AliEmcalTriggerOfflineSelection

(

)

Default constructor

Definition at line 37 of file AliEmcalTriggerOfflineSelection.cxx.

EMCalTriggerPtAnalysis::AliEmcalTriggerOfflineSelection::~AliEmcalTriggerOfflineSelection ( )

virtual

Destructor

Definition at line 42 of file AliEmcalTriggerOfflineSelection.cxx.

Member Function Documentation

Double_t EMCalTriggerPtAnalysis::AliEmcalTriggerOfflineSelection::GetThresholdForTrigger ( EmcalTriggerClass  trgcls ) const

inline

Get the offline trigger threshold (on energy) for a given trigger class.

Parameters

[in]

trgcls

Trigger class for which to check the threshold

Returns

Threshold for the given trigger class (0 if not set)

Definition at line 114 of file AliEmcalTriggerOfflineSelection.h.

Referenced by EMCalTriggerPtAnalysis::AliAnalysisTaskEmcalClustersRef::FindPatchesForTrigger().

static const TString& EMCalTriggerPtAnalysis::AliEmcalTriggerOfflineSelection::GetTriggerName ( EmcalTriggerClass  cls )

inlinestatic

Get the name of the trigger class as string representation

Parameters

[in]

cls

EMCAL/DCAL trigger class

Returns

Name of the trigger class

Definition at line 135 of file AliEmcalTriggerOfflineSelection.h.

Bool_t EMCalTriggerPtAnalysis::AliEmcalTriggerOfflineSelection::IsDCAL ( EmcalTriggerClass  cls )

static

Checks if the trigger class is a jet patch trigger class

Parameters

[in]

cls

Type of the trigger class to check

Returns

True if the trigger class is a single shower patch trigger class

Definition at line 98 of file AliEmcalTriggerOfflineSelection.cxx.

Referenced by EMCalTriggerPtAnalysis::AliAnalysisTaskEmcalClustersRef::FindPatchesForTrigger().

Bool_t EMCalTriggerPtAnalysis::AliEmcalTriggerOfflineSelection::IsOfflineSelected	(	EmcalTriggerClass	trgcls,
		const TClonesArray *const	triggerpatches
	)		const

Apply additional cut requiring at least one offline patch above a given energy (not fake ADC!) Attention: This task groups into single shower triggers (L0, EG1, EG2) and jet triggers (EJ1 and EJ2). Per convention the low threshold patch is selected. No energy cut should be applied in the trigger maker.

Patches are supposed to contain masking done in the trigger maker. If available, an acceptance map can be used to mimic patch azimuthal acceptance in simulation.

Attention: The component take over ownership of the histogram. Need to be set to nullptr once the histogram is read in.

Parameters

[in]	trgcls	Trigger class for which to apply additional offline patch selection
[in]	triggerpatches	Array of trigger patches

Returns

True if at least on patch above threshold is found or no cut is applied

Definition at line 48 of file AliEmcalTriggerOfflineSelection.cxx.

Referenced by EMCalTriggerPtAnalysis::AliAnalysisTaskEmcalTriggerBase::TriggerSelection().

Bool_t EMCalTriggerPtAnalysis::AliEmcalTriggerOfflineSelection::IsSingleShower ( EmcalTriggerClass  cls )

static

Checks if the trigger class is a single shower patch trigger class

Parameters

[in]

cls

Type of the trigger class to check

Returns

True if the trigger class is a single shower patch trigger class

Definition at line 93 of file AliEmcalTriggerOfflineSelection.cxx.

Referenced by EMCalTriggerPtAnalysis::AliAnalysisTaskEmcalClustersRef::FindPatchesForTrigger(), and EMCalTriggerPtAnalysis::AliAnalysisTaskEmcalTriggerBase::SelectOnlineTrigger().

void EMCalTriggerPtAnalysis::AliEmcalTriggerOfflineSelection::SetAcceptanceMap ( EmcalTriggerClass  trgcls, const TH2 *  accmap  )

inline

Set acceptance map for a given trigger class. The acceptance map is expected to be normalized to 1 for the position with the largest trigger patch

Parameters

[in]	trgcls	Trigger class for which to set then acceptance map
[in]	accmap	Acceptance map as 2D histogram

Definition at line 90 of file AliEmcalTriggerOfflineSelection.h.

Referenced by EMCalTriggerPtAnalysis::AliAnalysisTaskEmcalTriggerBase::ExecOnce().

void EMCalTriggerPtAnalysis::AliEmcalTriggerOfflineSelection::SetOfflineEnergyThreshold ( EmcalTriggerClass  trgcls, double  threshold  )

inline

Specify threshold for a given offline trigger class. Convention is a threshold on the patch energy (from cells) in GeV

Parameters

[in]	trgcls	Trigger class for which to set the threshold
[in]	threshold	Threshold value for the trigger class

Definition at line 82 of file AliEmcalTriggerOfflineSelection.h.

Member Data Documentation

const TH2* EMCalTriggerPtAnalysis::AliEmcalTriggerOfflineSelection::fAcceptanceMaps[kTrgn]

protected

! Online acceptance distribution

Definition at line 140 of file AliEmcalTriggerOfflineSelection.h.

Referenced by SetAcceptanceMap().

const TString EMCalTriggerPtAnalysis::AliEmcalTriggerOfflineSelection::fgkTriggerNames

staticprotected

Initial value:

= {
    "EMC7", "EG1", "EG2", "EJ1", "EJ2", "DMC7", "DG1", "DG2", "DJ1", "DJ2"
}

Names of the various trigger classes.

Definition at line 138 of file AliEmcalTriggerOfflineSelection.h.

Referenced by GetTriggerName().

Double_t EMCalTriggerPtAnalysis::AliEmcalTriggerOfflineSelection::fOfflineEnergyThreshold[kTrgn]

protected

Thresholds applied on offline energy.

Definition at line 139 of file AliEmcalTriggerOfflineSelection.h.

Referenced by GetThresholdForTrigger(), and SetOfflineEnergyThreshold().

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The documentation for this class was generated from the following files:

• PWGJE/EMCALJetTasks/Tracks/AliEmcalTriggerOfflineSelection.h
• PWGJE/EMCALJetTasks/Tracks/AliEmcalTriggerOfflineSelection.cxx